Port 3 Data Direction Register (P3Ddr); Port 3 Data Register (P3Dr) - Renesas H8S/2158 User Manual

Section 9 I/O Ports
9.3.1

Port 3 Data Direction Register (P3DDR)

The individual bits of P3DDR specify input or output for the pins of port 3.
Bit Bit Name
7 P37DDR
6 P36DDR
5 P35DDR
4 P34DDR
3 P33DDR
2 P32DDR
1 P31DDR
0 P30DDR
9.3.2

Port 3 Data Register (P3DR)

P3DR stores output data for the port 3 pins.
Bit Bit Name
7 P37DR
6 P36DR
5 P35DR
4 P34DR
3 P33DR
2 P32DR
1 P31DR
0 P30DR
Rev. 3.00 Jan 25, 2006 page 216 of 872
REJ09B0286-0300
Initial Value R/W
0 W
0 W
0 W
0 W
0 W
0 W
0 W
0 W
Initial Value R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
Description
In extended mode:
The port functions as the data bus regardless of
the values in these bits.
In single-chip mode:
The corresponding port 3 pins are output ports
when the P3DDR bits are set to 1, and input ports
when cleared to 0.
Description
In extended mode:
If a port 3 read is performed while the P3DDR bits
are set to 1, the P3DR values are read. When the
P3DDR bits are cleared to 0, 1 is read.
In single-chip mode:
P3DR stores output data for the port 3 pins that
are used as the general output port.
If a port 3 read is performed while the P3DDR bits
are set to 1, the P3DR values are read. If a port 3
read is performed while the P3DDR bits are
cleared to 0, the pin states are read.